1
|
Martinková P, Konečná H, Gintar P, Kryštofová K, Potěšil D, Trtílek M, Zdráhal Z. Benchmarking of Two Peptide Clean-Up Protocols: SP2 and Ethyl Acetate Extraction for Sodium Dodecyl Sulfate or Polyethylene Glycol Removal from Plant Samples before LC-MS/MS. Int J Mol Sci 2023; 24:17347. [PMID: 38139176 PMCID: PMC10743447 DOI: 10.3390/ijms242417347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 12/05/2023] [Accepted: 12/07/2023] [Indexed: 12/24/2023] Open
Abstract
The success of bottom-up proteomic analysis frequently depends on the efficient removal of contaminants from protein or peptide samples before LC-MS/MS. For a peptide clean-up workflow, single-pot solid-phase-enhanced peptide sample preparation on carboxylate-modified paramagnetic beads (termed SP2) was evaluated for sodium dodecyl sulfate or polyethylene glycol removal from Arabidopsis thaliana tryptic peptides. The robust and efficient 40-min SP2 protocol, tested for 10-ng, 250-ng, and 10-µg peptide samples, was proposed and benchmarked thoroughly against the ethyl acetate extraction protocol. The SP2 protocol on carboxylated magnetic beads proved to be the most robust approach, even for the simultaneous removal of massive sodium dodecyl sulfate (SDS) and polyethylene glycol (PEG) contaminations from AT peptide samples in respect of the LC-MS/MS data outperforming ethyl acetate extraction.
Collapse
Affiliation(s)
- Petra Martinková
- Mendel Centre for Plant Genomics and Proteomics, Central European Institute of Technology, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic; (P.M.); (P.G.); (K.K.); (D.P.)
- National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Hana Konečná
- Mendel Centre for Plant Genomics and Proteomics, Central European Institute of Technology, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic; (P.M.); (P.G.); (K.K.); (D.P.)
- National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Petr Gintar
- Mendel Centre for Plant Genomics and Proteomics, Central European Institute of Technology, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic; (P.M.); (P.G.); (K.K.); (D.P.)
- National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Karolína Kryštofová
- Mendel Centre for Plant Genomics and Proteomics, Central European Institute of Technology, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic; (P.M.); (P.G.); (K.K.); (D.P.)
- National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - David Potěšil
- Mendel Centre for Plant Genomics and Proteomics, Central European Institute of Technology, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic; (P.M.); (P.G.); (K.K.); (D.P.)
| | - Martin Trtílek
- Photon Systems Instruments, Spol. s r.o., Průmyslová 470, 664 24 Drásov, Czech Republic
| | - Zbyněk Zdráhal
- Mendel Centre for Plant Genomics and Proteomics, Central European Institute of Technology, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic; (P.M.); (P.G.); (K.K.); (D.P.)
- National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| |
Collapse
|
2
|
Liu L, Zou C, Lv X, Wei H, Wu S, Song J, Tang Z, Luo H, Li X, Ai Y. SP2-induced circPUM1 modulates chemoresistance and nature killer cell toxicity in oral squamous cell carcinoma. J Cell Mol Med 2023; 28:e17888. [PMID: 37556099 PMCID: PMC10902577 DOI: 10.1111/jcmm.17888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 07/04/2023] [Accepted: 07/22/2023] [Indexed: 08/10/2023] Open
Abstract
Oral squamous cell carcinoma (OSCC) is a type of tumour found in the cavity that is characterized by differentiation and metastasis to the lymph nodes. Although diagnosis strategy and clinical treatment have recently improved, the outcomes for OSCC patients remain unsatisfactory. This study verified the characteristics of circPUM1 in OSCC cells, subsequently generating dysregulated circPUM1 cell models, showing that circPUM1 promoted chemoresistance and natural killer (NK) cell toxicity. Furthermore, the transcription factor SP2 regulated the expression of circPUM1 in OSCC cells, circPUM1 acted as a molecular sponge for miR-770-5p. Moreover, Nucleosome Assembly Protein 1 Like 1 (NAP1L1) is a downstream target for miR-770-5p and essential for circPUM1-mediated cisplatin resistance and NK cell cytotoxicity in OSCC cells. The network composed of SP2, circPUM1, miR-770-5p and NAP1L1 in OSCC appears to be a promising avenue for the development of novel targets for diagnosing or treating OSCC.
Collapse
Affiliation(s)
- Lian Liu
- Foshan Stomatological Hospital, School of Medicine, Foshan University, Foshan, China
| | - Chen Zou
- Foshan Stomatological Hospital, School of Medicine, Foshan University, Foshan, China
| | - Xiaozhi Lv
- Department of Oral and Maxillofacial Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Haigang Wei
- Foshan Stomatological Hospital, School of Medicine, Foshan University, Foshan, China
| | - Siyuan Wu
- Foshan Stomatological Hospital, School of Medicine, Foshan University, Foshan, China
| | - Jing Song
- Foshan Stomatological Hospital, School of Medicine, Foshan University, Foshan, China
| | - Zhe Tang
- Foshan Stomatological Hospital, School of Medicine, Foshan University, Foshan, China
| | - Hailing Luo
- Foshan Stomatological Hospital, School of Medicine, Foshan University, Foshan, China
| | - Xia Li
- Foshan Stomatological Hospital, School of Medicine, Foshan University, Foshan, China
| | - Yilong Ai
- Foshan Stomatological Hospital, School of Medicine, Foshan University, Foshan, China
| |
Collapse
|
3
|
Zhang S, Feng T, Ji J, Wang L, An C. Serine protease SP7 cleaves prophenoloxidase and is regulated by two serpins in Ostrinia furnacalis melanization. Insect Biochem Mol Biol 2022; 141:103699. [PMID: 34920078 DOI: 10.1016/j.ibmb.2021.103699] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 07/18/2021] [Accepted: 11/17/2021] [Indexed: 06/14/2023]
Abstract
Melanization is an innate immune response in insects to defend against the invading pathogens and parasites. During melanization, prophenoloxidase (PPO) requires proteolytic activation by its upstream prophenoloxidase-activating protease (PAP). We here cloned a full-length cDNA for a serine protease, named as SP7, from Ostrinia furnacalis. The open reading frame of SP7 encodes 421-amino acid residue protein with a 19-residue signal peptide. qRT-PCR analysis showed that SP7 mRNA levels were significantly upregulated upon exposure to microbial infection. Recombinant SP7 zymogen was activated by serine protease SP2. The active SP7 could cleave O. furnacalis PPOs including PPO2, PPO1b and PPO3. Additionally, active SP7 could form covalent complexes with serine protease inhibitor serpin-3 and serpin-4. The activity of SP7 in cleaving a colorimetric substrate IEARpNA or O. furnacalis PPOs was efficiently blocked by either serpin-3 or serpin-4. Our work thus revealed that SP7 and SP2 partially constituted a PPO activation cascade in which SP7 was activated by SP2 and then likely worked as a PAP. SP7 was effectively regulated by serpin-3 and serpin-4. The results would allow further advances in the understanding of melanization mechanisms in O. furnacalis.
Collapse
Affiliation(s)
- Shasha Zhang
- Department of Entomology, College of Plant Protection, China Agricultural University, Beijing, 100193, PR China
| | - Ting Feng
- Department of Entomology, College of Plant Protection, China Agricultural University, Beijing, 100193, PR China
| | - Jiayue Ji
- Department of Entomology, College of Plant Protection, China Agricultural University, Beijing, 100193, PR China
| | - Lei Wang
- Department of Entomology, College of Plant Protection, China Agricultural University, Beijing, 100193, PR China
| | - Chunju An
- Department of Entomology, College of Plant Protection, China Agricultural University, Beijing, 100193, PR China.
| |
Collapse
|
4
|
Zheng R, Zhu P, Gu J, Ni B, Sun H, He K, Bian J, Shao Y, Du J. Transcription factor Sp2 promotes TGFB-mediated interstitial cell osteogenic differentiation in bicuspid aortic valves through a SMAD-dependent pathway. Exp Cell Res 2021; 411:112972. [PMID: 34914964 DOI: 10.1016/j.yexcr.2021.112972] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Revised: 12/04/2021] [Accepted: 12/10/2021] [Indexed: 11/04/2022]
Abstract
Calcification of the bicuspid aortic valve (BAV) involves differential expression of various RNA genes, which is achieved through complex regulatory networks that are controlled in part by transcription factors and microRNAs. We previously found that miR-195-5p regulates the osteogenic differentiation of valvular interstitial cells (VICs) by targeting the TGF-β pathway. However, the transcriptional regulation of miR-195-5p in calcified BAV patients is not yet clear. In this study, stenotic aortic valve tissues from patients with BAVs and tricuspid aortic valves (TAVs) were collected. Candidate transcription factors of miR-195-5p were predicted by bioinformatics analysis and tested in diseased valves and in male porcine VICs. SP2 gene expression and the corresponding protein levels in BAV were significantly lower than those in TAV, and a low SP2 expression level environment in VICs resulted in remarkable increases in RNA expression levels of RUNX2, BMP2, collagen 1, MMP2, and MMP9 and the corresponding proteins. ChIP assays revealed that SP2 directly bound to the transcription promoter region of miR-195-5p. Cotransfection of SP2 shRNA and a miR-195-5p mimic in porcine VICs demonstrated that SP2 repressed SMAD7 expression via miR-195-5p, while knockdown of SP2 increased the mRNA expression of SMAD7 and the corresponding protein and attenuated Smad 2/3 expression. Immunofluorescence staining of diseased valves confirmed that the functional proteins of osteogenesis differentiation, including RUNX2, BMP2, collagen 1, and osteocalcin, were overexpressed in BAVs. In Conclusion, the transcription factor Sp2 is expressed at low levels in VICs from BAV patients, which has a negative impact on miR-195-5p expression by binding its promoter region and partially promotes calcification through a SMAD-dependent pathway.
Collapse
Affiliation(s)
- Rui Zheng
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, PR China
| | - Pengcheng Zhu
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, PR China
| | - Jiaxi Gu
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, PR China
| | - Buqing Ni
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, PR China
| | - Haoliang Sun
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, PR China
| | - Keshuai He
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, PR China
| | - Jinhui Bian
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, PR China
| | - Yongfeng Shao
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, PR China.
| | - Junjie Du
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, PR China.
| |
Collapse
|
5
|
Zhang J, Yang Y, Liu H, Hu H. Src-1 and SP2 promote the proliferation and epithelial-mesenchymal transition of nasopharyngeal carcinoma. Open Med (Wars) 2021; 16:1061-1069. [PMID: 34307888 PMCID: PMC8284335 DOI: 10.1515/med-2021-0248] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 01/09/2021] [Accepted: 02/08/2021] [Indexed: 12/14/2022] Open
Abstract
Nasopharyngeal carcinoma (NPC) is characterized by high morbidity and morality, especially in Southern China. Transcription factors intensively participate in the initiation and development of NPC. This study aimed to investigate the roles of Src-1 in NPC. mRNA level was determined by qRT-PCR. Western blot was carried out for the protein level. CCK-8 assay was performed to determine cell viability, colony formation for NPC cell proliferation, and transwell for cell migration and invasion ability. The results showed Steroid receptor coactivator 1 (Src-1) was overexpressed in SNE-2 and 6-10B. The expression of Src-1 and SP2 was in positive correlation. Overexpression of Src-1 promoted the cell viability, colony formation, and epithelial-mesenchymal transition (EMT), manifested by the increase of migration and invasion ability, while knockdown of Src-1 exerted opposite effects. Additionally, knockdown or overexpression of SP2 reversed the effects of overexpressed or downregulated Src-1, which was reversed by the depletion of SP2. Moreover, Src-1 interacted with SP2 to regulate EMT-related genes such as E-cad, N-cad, Vimentin, and ZEB1, and proliferation- and apoptosis-related genes, such as bax, cytochrome c, and cleaved caspase3 and bcl-2. Thus, blocking the interaction between Src-1 and SP2 may be a therapeutic target for inhibiting the metastasis of NPC.
Collapse
Affiliation(s)
- Jingjing Zhang
- Ear, Nose, Throat Department, Peking University Shenzhen Hospital, Shenzhen, Guangdong 518000, China
| | - Yuanyuan Yang
- Ear, Nose, Throat Department, Peking University Shenzhen Hospital, Shenzhen, Guangdong 518000, China
| | - Hongyu Liu
- Ear, Nose, Throat Department, Peking University Shenzhen Hospital, Shenzhen, Guangdong 518000, China
| | - Hongyi Hu
- Ear, Nose, Throat Department, Peking University Shenzhen Hospital, Shenzhen, Guangdong 518000, China
| |
Collapse
|
6
|
Cho C, Schwarz JP, Perring AE, Lamb KD, Kondo Y, Park JU, Park DH, Shim K, Park JS, Park RJ, Lee M, Song CK, Kim SW. Light-absorption enhancement of black carbon in the Asian outflow inferred from airborne SP2 and in-situ measurements during KORUS-AQ. Sci Total Environ 2021; 773:145531. [PMID: 33582332 DOI: 10.1016/j.scitotenv.2021.145531] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 01/21/2021] [Accepted: 01/26/2021] [Indexed: 06/12/2023]
Abstract
We investigated the changes in the size distribution, coating thickness, and mass absorption cross-section (MAC) of black carbon (BC) with aging and estimated the light absorption enhancement (Eabs) in the Asian outflow from airborne in-situ measurements during 2016 KORUS-AQ campaign. The BC number concentration decreased, but mass mean diameter increased with increasing altitude in the West Coast (WC) and Seoul Metropolitan Area (SMA), reflecting the contrast between freshly emitted BC-containing particles at the surface and more aged aerosol associated with aggregation during vertical mixing and transport. Contradistinctively, BC number and mass size distributions were relatively invariant with altitude over the Yellow Sea (YS) because sufficiently aged BC from eastern China were horizontally transported to all altitudes over the YS, and there are no significant sources at the surface. The averaged inferred MAC of refractory BC in three regions reflecting differences in their size distributions increased to 9.8 ± 1.0 m2 g-1 (YS), 9.3 ± 0.9 m2 g-1 (WC), and 8.2 ± 0.9 m2 g-1 (SMA) as BC coating thickness increased from 20 nm to 120 nm. The absorption coefficient of BC calculated from the coating thickness and MAC were highly correlated with the filter-based absorption measurements with the slope of 1.16 and R2 of 0.96 at 550 nm, revealing that the thickly coated BC had a large MAC and absorption coefficient. The Eabs due to the inferred coatings was estimated as 1.0-1.6, which was about 30% lower than those from climate models and laboratory experiments, suggesting that the increase in the BC absorption by the coatings in the Asian outflow is not as large as calculated in the previous studies. Organics contributed to the largest Eabs accounting for 69% (YS), 61% (WC), and 64% (SMA). This implies that organics are largely responsible for the lensing effect of BC rather than sulfates in the Asian outflow.
Collapse
Affiliation(s)
- Chaeyoon Cho
- School of Earth and Environmental Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Joshua P Schwarz
- NOAA Earth System Research Laboratory (ESRL), Chemical Sciences Division, Boulder, CO 80305, USA
| | - Anne E Perring
- NOAA Earth System Research Laboratory (ESRL), Chemical Sciences Division, Boulder, CO 80305, USA
| | - Kara D Lamb
- NOAA Earth System Research Laboratory (ESRL), Chemical Sciences Division, Boulder, CO 80305, USA; Cooperative Institute for Research in the Environmental Sciences (CIRES), University of Colorado, Boulder, CO 80309, USA
| | - Yutaka Kondo
- National Institute for Polar Research, Tachikawa, Tokyo 190-8518, Japan
| | - Jong-Uk Park
- School of Earth and Environmental Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Do-Hyeon Park
- School of Earth and Environmental Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Kyuseok Shim
- School of Earth and Environmental Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Jin-Soo Park
- National Institute of Environmental Research, Incheon 22689, Republic of Korea
| | - Rokjin J Park
- School of Earth and Environmental Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Meehye Lee
- Department of Earth and Environmental Sciences, Korea University, Seoul 02841, Republic of Korea
| | - Chang-Keun Song
- School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea
| | - Sang-Woo Kim
- School of Earth and Environmental Sciences, Seoul National University, Seoul 08826, Republic of Korea.
| |
Collapse
|
7
|
Liu Y, Cao P, Cao F, Wang S, He Y, Xu Y, Wang Y. ANLN, Regulated by SP2, Promotes Colorectal Carcinoma Cell Proliferation via PI3K/AKT and MAPK Signaling Pathway. J INVEST SURG 2021; 35:268-277. [PMID: 33757382 DOI: 10.1080/08941939.2020.1850939] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
BACKGROUND Aberrant expression of Anillin (ANLN) has been shown to function in the development of multiple cancers. However, its effects on colorectal carcinoma (CRC) remain unclear. We aimed to explore the role of ANLN in CRC development. METHODS By real-time quantitative polymerase chain reaction (RT-qPCR), Western blot, and immunohistochemistry (IHC), we assessed the expression level of ANLN in CRC tissues and cell lines. The role of ANLN in CRC cell proliferation was evaluated by CCK-8 assays, colony formation assays, EdU assays and cell cycle assays. A mouse tumorigenic model was established to evaluate the in vivo function of ANLN. RESULTS We found that ANLN was overexpressed in CRC tissues and cell lines. Highly expressed ANLN correlated with tumor size, tumor number, and stage in patients with CRC. Silencing ANLN in CRC cell lines suppressed proliferation both in vitro and in vivo and induced G0/G1 cell cycle arrest. Downregulation of ANLN led to reduced phosphorylated levels of AKT and ERK. However, total AKT protein showed no change. SP2, a critical transcription factor, was implicated in the upregulation of ANLN. CONCLUSIONS Our study demonstrated that ANLN regulates CRC cell proliferation via the PI3K/AKT and MAPK pathways, indicating that ANLN may represent a novel and effective target for CRC treatment.
Collapse
Affiliation(s)
- Yanwei Liu
- Department of General Surgery, The Second Hospital of Anhui Medical University, Hefei, China
| | - Pengwei Cao
- Department of General Surgery, The Second Hospital of Anhui Medical University, Hefei, China
| | - Feng Cao
- Department of General Surgery, The Second Hospital of Anhui Medical University, Hefei, China
| | - Song Wang
- Department of General Surgery, The Second Hospital of Anhui Medical University, Hefei, China
| | - Yan He
- Department of General Surgery, The Second Hospital of Anhui Medical University, Hefei, China
| | - Yanyan Xu
- Department of General Surgery, The Second Hospital of Anhui Medical University, Hefei, China
| | - Yong Wang
- Department of General Surgery, The Second Hospital of Anhui Medical University, Hefei, China
| |
Collapse
|
8
|
Suske G. NF-Y and SP transcription factors — New insights in a long-standing liaison. Biochimica et Biophysica Acta (BBA) - Gene Regulatory Mechanisms 2017; 1860:590-597. [DOI: 10.1016/j.bbagrm.2016.08.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 08/18/2016] [Accepted: 08/24/2016] [Indexed: 12/31/2022]
|
9
|
Zhou Y, Wu C, Sheng Q, Jiang C, Chen Q, Lv Z, Yao J, Nie Z. Lysine acetylation stabilizes SP2 protein in the silkworm Bombyx mori. J Insect Physiol 2016; 91-92:56-62. [PMID: 27374983 DOI: 10.1016/j.jinsphys.2016.06.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Revised: 06/24/2016] [Accepted: 06/29/2016] [Indexed: 06/06/2023]
Abstract
Lysine acetylation (Kac) is a vital post-translational modification that plays an important role in many cellular processes in organisms. In the present study, the nutrient storage proteins in hemolymph were first found to be highly acetylated-particularly SP2 protein, which contains 20 potential Kac sites. Further results confirmed that lysine acetylation could stabilize and up-regulate the protein level of anti-apoptosis protein SP2, thereby improving the survival of H2O2-treated BmN cells and suppressing the apoptosis induced by H2O2. The potential mechanism involved in the inhibition of ubiquitin-mediated proteasomal degradation by crosstalk between lysine acetylation and ubiquitination. Our results showed that the increase in the acetylation level by TSA could decrease the ubiquitination and improve the protein level of SP2, indicating that lysine acetylation could influence the SP2 protein level through competition between ubiquitination and the suppression of ubiquitin-mediated proteasomal degradation, thereby stabilizing the protein. SP2 is a major nutrient storage protein from hemolymph for amino acid storage and utilization. The crosstalk between lysine acetylation and ubiquitination of SP2 might imply an important role of lysine acetylation for nutrient storage and utilization in silkworm.
Collapse
Affiliation(s)
- Yong Zhou
- College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Chengcheng Wu
- College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Qing Sheng
- College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Caiying Jiang
- College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Qin Chen
- College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Zhengbing Lv
- College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Juming Yao
- College of Materials and Textile, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Zuoming Nie
- College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, China; College of Materials and Textile, Zhejiang Sci-Tech University, Hangzhou 310018, China.
| |
Collapse
|